INDUSTRIAL DRIVE COUPLINGS FOR THE MOST DEMANDING POWER TRANSMISSION APPLICATIONS.

Transcription

1 RELIABLE COMPACT ROBUST INDUSTRIAL DRIVE COUPLINGS FOR THE MOST DEMANDING POWER TRANSMISSION APPLICATIONS. RW-COUPLINGS.COM THE COUPLING.

2 WHO WE ARE. ABOVE ALL R+W IS: THE PERFECT COUPLING. When R+W Antriebselemente GmbH was first established in 1990 in Klingenberg, Germany, there were three people on board. The head office is still there, but we are now more than 170 people, with subsidiaries in the USA, China, Italy, Singapore, France and Slovakia, and are partnered with over 60 well established distributors in more than 40 countries throughout the world. Many developments have lead to this success, but most importantly it was brought about by our endless search for the best possible coupling solutions as well as the high esteem in which we hold all of our customers. WE PROVIDE INSPIRED SOLUTIONS BACKED BY SOUND PLANNING AND DESIGN. R+W stands for expertise in the development of solutions for precise torque transmission. The focus of our development is on innovative coupling systems for all sectors of precision drive technology. As a leading manufacturer of precision couplings and line shafts, we strive to maintain a permanent status of technology leadership in our field. Our central claim: R+W couplings ensure precision for process reliability and efficiency, and to that end we seek perfection. Optimized for technology and business, our product portfolio includes: Metallic couplings Elastic couplings Ball-detent safety couplings Drive shafts Industrial Drive couplings Development of customized solutions with collaboration from start to finish, including: Consultation Conception Engineering analysis Prototyping Manufacturing

3 DRIVE D - DYNAMIC Our staff is trained to always be ready and willing to provide a quick reaction to customer inquiries. Our product, the core of which is based on handling high performance, dynamic applications, is increasingly available for fast delivery. R - RELIABLE Many of our products are designed for infinite life with zero maintenance required. With thorough engineering processes in place, and an ISO 9001:2008 certified production facility, we continue to deliver high quality coupling products with a high level of reliability. I - INNOVATIVE Our business was founded on developing unique and innovative solutions to common coupling problems. Our staff in turn is constantly developing its work flows to streamline delivery and simplify the process for our customers. V - VERSATILE With products successfully applied and deployed in over 125 industry segments, chances are very good that we have an expert on our versatile staff that is familiar with your application requirements. E - EXPANDING With double digit annual growth the norm, our company is ever expanding, adding new product offerings and opening new service centers throughout the world all the time. MORE R+W COUPLINGS Aside from the products detailed in this catalog, we also offer high quality shaft couplings and torque limiters for servo motion control and other small to mid-size precision applications. More information on these can be found in our PRECISION COUPLINGS catalog. RW-COUPLINGS.COM

4 SIZING SIZING AND SELECTION According to DIN 740 part 2 RW-COUPLINGS.COM 7

5 SIZING AND SELECTION SAFETY COUPLINGS ST SYMBOLS T AR = Disengagement torque of the coupling (Nm) K = Service factor T max = Maximum torque of the drive system (Nm) T AN = Rated torque of the motor (Nm) P Drive = Drive power (kw) n = Drive speed (min -1 ) α = Angular acceleration rad t = Acceleration time (s) s 2 ω = Angular velocity (rad/s) J L = Moment of inertia of load (kgm 2 ) J A = Moment of inertia of drive (kgm 2 ) T AS = Peak motor torque (Nm) S = Number of safety elements F = Tangential force (kn) r = Radius to element (m) s = Spindle pitch (mm) F V = Feed force (N) η = Spindle efficiency d 0 = Pitch diameter (mm) F V = Feed force (N) C T = Torsional stiffness of coupling (Nm/rad) J Masch. = Total load inertia (kgm 2 ) (e.g. shaft + sprocket + chain + roller + 1/2 of coupling) J Mot. = Total driving inertia (kgm 2 ) (e.g. motor shaft + 1/2 of coupling) = Resonant frequency of the two mass system (Hz) f e Shock or Load Factor S A uniform load non-uniform load heavy shock load For many crushing and shredding applications load factors are commonly S A = 2-3 ACCORDING TO DISENGAGEMENT TORQUE Safety couplings are normally selected according to the required disengagement torque, which must be greater than the maximum torque required for start-up and operation. Disengagement torque values are often determined from the drive data and are typically a multiple of the nominal torque at the operating drive speed (TAN). In addition to a start-up torque (TMAX), the following values are used as further safety factors, depending on the load conditions: K = 1.3 uniform harmonious load K = 1.5 non-uniform load K = 1.8 heavy shock load or T AR K T (Nm) max T AN 9,550 PDrive (Nm) n 8

6 ACCORDING TO ACCELERATION (START-UP WITH NO LOAD) α = ω n = π n t 30 ACCORDING TO ACCELERATION (START-UP WITH LOAD) ACCORDING TO THE NUMBER OF SAFETY ELEMENTS SIZING T AR α J L J L J A + J L T As S A (Nm) T AR α J L + T AN J L J A + J (T AS T AN ) + T [ AN L ] S A (Nm) T AR = S F r 0,11 m radius motor shaft ACCORDING TO LINEAR FEED FORCE Screw drive T AN = Rack and pinion drive s Fv 2,000 π η (Nm) T AN = d0 Fv 2,000 (Nm) ACCORDING TO RESONANT FREQUENCY The torsional natural frequency of the coupling must be significantly higher or lower than that of the equipment. For the mechanical substitution model the two mass system applies. f e = 1 2 π C T J Masch + J Mot J Masch J Mot (Hz) RW-COUPLINGS.COM 9

7 SIZING AND SELECTION SAFETY COUPLINGS ST ELASTIC JAW COUPLING DESIGN ST2 Size ST2 / 10 ST2 / 25 ST2 / 60 ST2 / 160 T KN Rated Torque (Nm) 10,000 15,000 40,000 80,000 T Kmax Maximum Torque (Nm) 22,000 33,000 88, ,000 Torsional Stiffness (10 3 Nm/rad) Relative Damping LOAD FACTORS BY MACHINE TYPE EXCAVATORS S bucket chain excavators S traveling gear (caterpillar) M traveling gear (rails) M suction pumps S bucket wheels M slewing gears CONSTRUCTION MACHINERY M concrete mixers M road construction machinery CHEMICAL INDUSTRY M mixers G agitators (light fluids) M dryer drums G centrifuges FEEDERS AND CONVEYORS S belt conveyors G belt conveyors (bulk materials) M belt bucket conveyors M screw conveyors M circular conveyors M hoists ¹) P = power of drive in kw n = speed of drive in rpm BLOWERS AND FANS¹ G blowers (axial/radial) P:n M blowers (axial/radial) P:n S blowers (axial/radial) P:n > G cooling tower fans P:n M cooling tower fans P:n S cooling tower fans P:n > GENERATORS AND TRANSFORMERS S generators RUBBER MACHINERY S extruders S calendars M mixers S rolling millse WOOD PROCESSING MACHINERY G woodworking machines CRANES S traveling gears S hoisting gears M slewing gears PLASTICS MACHINERY M mixers M shredders METALWORKING MACHINERY M sheet metal bending machines S plate straightening machines S presses M shears S punch presses M machine tools, main drives FOOD PROCESSING MACHINERY G filling machines M kneading machines M cane crushers M cane cutters S cane mills M sugar beet cutters M sugar beet washers PAPER MACHINERY S wood cutters S calendars S wet presses S suction presses S suction rollers S drying cylinders PUMPS S piston pumps G centrifugal pumps (light fluids) S reciprocating pumps STONE AND CLAY MACHINES S breakers S rotary kilns S hammer mills S brick presses TEXTILE MACHINERY M tanning vats M willows M looms COMPRESSORS S reciprocating compressors M centrifugal compressors METAL ROLLING MILLS M plate tilters S ingot handling machinery M winding machines (strip and wire) S descaling machines S cold rolling mills M chain transfers M cross transfers M roller straighteners S tube welding machines S continuous casting plants M roller adjustment drives LAUNDRY MACHINES M tumblers M washing machines WASTEWATER TREATMENT PLANTS M aerators G screw pumps 10

8 SIZING DESIGN FACTORS Shock or Load Factor S A Drive type electric motors, turbines, hydraulic motors internal combustion engines 4 cylinder degree of uniformity 1:100 Load characteristics of driven machine G M S G = smooth uniform load M = moderate load S = heavy shock load Temperature Factor S υ Ambient Temperature Starts per Hour -40 C +30 C +40 C +60 C +80 C > +80 C S υ on request Start Factor S Z >240 S Z on request ACCORDING TO TORQUE 1. Calculate the drive torque T AN. T AN 9,550 PDrive n (Nm) 2. Base the coupling rated torque T KN on the drive torque T AN multiplied by the application factors. T KN T AN S A S υ S Z Example: Coupling between an electric motor (P=450kW and n=980 rpm) and a gearbox driving a conveyor. T AN = 9, kw 980 min. -1 = 4,385.2 Nm smooth uniform load = G : S A = 1.25 ambient temperature 40 C : S υ = 1.1 starts 30/h : S Z = 1.0 T KN T AN S A S υ S Z T KN 4,385.2 Nm = 6,029.7 Nm Selected coupling: ST2 / 10 with elastomer coupling T KN = 6,030 Nm All data subject to change without notice. RW-COUPLINGS.COM 11

9 SIZING AND SELECTION SAFETY COUPLINGS ST GEAR COUPLING DESIGN ST4 Size ST4 / 10 ST4 / 25 ST4 / 60 ST4 / 160 T KN Rated Torque (Nm) 16,000 22,000 62, ,000 T Kmax Maximum Torque (Nm) 32,000 44, , ,000 Volume of Grease (dm 3 ) n Ref (max speed) (min. -1 ) 6,050 5,150 3,600 3,050 *only allowable at reduced torque and misalignment levels (see table on page 13) ACCORDING TO TORQUE 1. Calculate the drive torque. T AN. T AN 9,550 PDrive n (Nm) 2. Base the coupling rated torque T KN on the drive torque T AN multiplied by the application factor. (see page 17 for shock or load factors S A ). T KN T AN S A Example: Coupling between an electric motor (P=1000kW and n=980 rpm) and a gearbox driving a screw conveyor (S A = 1.6). T AN = 9, kw 980 min. -1 = 9,744 Nm T KN T AN T KN 9,744 Nm S A 1.6 = 15,591 Nm Selected coupling: ST4 / 10 with gear coupling T KN = 16,000 Nm 12

10 SIZING RATINGS CHART Maximum torque, speed and misalignment are related and can not exist at the same time. Evaluation of T/T KN and n / n max Compare plotted values for combined limits Torque Angular misalign Angular misalign. 0.5 Non-allowable zone Please contact R+W Angular misalign Angular misalign. 0.3 Speed n/ nmax (%) Example: Coupling ST4 / 10 5,600 T = 5,600 Nm T/ = = 35% TKN 16,000 2,700 n = 2,700 min. -1 n/ = = 45% nmax Angular misalignment: 0.4 6,050 Coupling is within operable range - ST4 / 10 can be used. RW-COUPLINGS.COM 13

11 ST SIZES FROM 2, ,000 Nm SAFETY COUPLINGS SAFETY COUPLINGS ST GENERAL INFORMATION ABOUT R+W SAFETY COUPLINGS: SERVICE LIFE When properly installed and handled these couplings are completely wear and maintenance free. FIT CLEARANCE Overall shaft / hub clearance of mm TEMPERATURE RANGE -30 to +120 C SPECIAL SOLUTIONS Automatic re-engagement, special materials, special flanges, bore profiles, etc. are available on request. ATEX (Optional) For use in hazardous areas available upon request. DISENGAGEMENT BEHAVIOR Full disengagement / manual reset is standard. RW-COUPLINGS.COM 35

12 ST TORSIONALLY STIFF SAFETY COUPLINGS SIZES FROM KNm MODEL FEATURES ST1 with simple keyway mounting for indirect drives from KNm compact, simple design precise overload protection torsionally stiff integral bearing for overhung load support Page 40 STN with conical clamping ring for indirect drives from KNm high shaft clamping pressure compact, simple design precise overload protection torsionally stiff integral bearing for overhung load support Page 41 ST2 with simple keyway mounting and elastic coupling from KNm vibration damping compensation for misalignment precise overload protection elastomer segments resistant to oil and dirt press fit design Page 42 ST4 with simple keyway mounting and crowned gear coupling from KNm high power density compensation for misalignment precise overload protection low reaction loads on shaft bearings torsionally stiff Page 44 36

13 GENERAL INFORMATION SAFETY COUPLINGS ST1 STN ST2 ST4 TORQUE ADJUSTMENT Face spanner wrench Adjustment nut Bores for spanner wrench Locking screws E 3 ISO 4762 ST Element Scale Positive stop Adjustment nut Preset disengagement force value (6KN) Scale representing number of turns SAFETY COUPLINGS ST Element size ST Element max. 9x Additional locking screw Serial number Adjustment range Disengagement force Increment of adjustment between red dots Adjustment range Red dot (adjustment increments) Yellow dot (customer specified disengagement force) After loosening (approx. 1 rotation) the locking screws (E 3 ), the adjustment nut can be turned to adjust the disengagement setting. Incremental values are marked on the adjustment scale. After adjustment, the torque setting is secured by tightening the locking screws (E 3 ). Note All safety elements must be set to the same value. RE-ENGAGEMENT OF THE SAFETY ELEMENTS After the overload has been cleared, the drive or driven side must be rotated until the re-engagement position markings are lined up. The elements can only be re-engaged in this position. The element is re-engaged through applying an axial force to the plunger. Re-engagement is audible. Once this is complete, the torque limiter is ready for operation. with rubber mallet Re-engagement position markings Disengaged element Actuation path (H) with lever Actuation path (H) Applied axial force (F) MANUAL DISENGAGEMENT OF ELEMENTS Prior to machine start-up, the individual elements can be manually disengaged. A manual disengagement tool is available from R+W (see page 13). Engaged element Disengaged element RW-COUPLINGS.COM 37

14 GENERAL INFORMATION SAFETY COUPLINGS RELIABLE TORQUE OVERLOAD PROTECTION ST series safety couplings are designed to decouple machine drives in the event of torque overload, preventing damage and downtime. A series of ball bearings are spring loaded into detents on an otherwise freely spinning output plate. In the case of the ST series, these ball bearings are mounted onto plungers which are individually loaded in order to generate high clutching forces while maintaining a relatively small profile. The transmittable torque is determined by the number and force setting of the safety elements and their distance from the center of the rotational axis. In the event of an overload, the force applied by the detents causes the plungers to overcome the spring loading and retract into the housings, resulting in a complete separation of the driving and driven hubs. They will not re-engage automatically. After the overload condition has passed, an axial force must be applied in order to re-engage the safety elements into the detents of the output plate. This is normally accomplished without any special tools, simply requiring a mallet or pry bar. The safety elements consist of two components: the detent receptacle and the adjustable plunger mechanism. The force setting is clearly marked on an adjusting scale. 38

15 GENERAL INFORMATION SAFETY COUPLINGS OPTION: HYDRAULIC ACTUATED RE-ENGAGEMENT With a new combination of hydraulic and mechanical components, the special SH version is available for automatic re-engagement. The SH system is available to be incorporated into all of the standard ST series safety couplings, from 2, ,000 Nm. After an overload the coupling can be slowly rotated in reverse to cause the safety elements to automatically engage upon reaching the next set of detent receptacles. This reduces downtime in heavy equipment by allowing for remote re-engagement of the safety coupling. Incorporation of the SH system into any standard ST model has no impact on the overall space envelope requirements. SAFETY COUPLINGS ST RW-COUPLINGS.COM 39

16 ST1 WITH SIMPLE KEYWAY MOUNTING KNm ABOUT MATERIAL Hardened steel (nitrocarburized surface) DESIGN Drive side: coupling hub with keyway connection (spline profile on request) Driven side: output flange with 12x fastening threads and integral bearings Safety elements: evenly spaced around the circumference; externally adjustable Ø B DIN 6885 J N A 1 drawn offset ISO 4029 Ø G h7 H Ø F Ø E H7 K A 2 C Ø D F7 Ø P Ø 0 Ø Q MODEL ST1 Bores for manual rotation number of safety elements depends on disengagement torque I M L plunger for re-engagement SIZE Adjustment range available from - to (KNm) 3 x ST 15 6 x ST 15 9 x ST 15 3 x ST 15 6 x ST 15 9 x ST 15 3 x ST 30 6 x ST 30 9 x ST 30 3 x ST 70 6 x ST 70 9 x ST 70 Overall length (mm) A Bore depth (mm) A Flange outside diameter (mm) B Fit length (mm) C Bore diameter possible Ø to Ø F7 (mm) D Flange centering diameter H7 (mm) E Bolt circle diameter ±0.3 (mm) F Outside diameter h7 (mm) G Fastening threads H 12 x M16 12 x M16 12 x M20 12 x M24 Thread depth (mm) I Fit length (mm) J Wall thickness (mm) K Distance (mm) L Distance (mm) M Actuation path (mm) N 4 4 7,5 10 Mounting diameter - elements (mm) O Hub outside diameter (mm) P Bore for fastening screw (mm) Q max. Ø 110 max. Ø 140 max. Ø 200 max. Ø 290 Moment of inertia (approx.) D max. (10 ³ kgm²) Speed max. (rpm) Allowable max. radial force standard* (KN) Approx. weight at D max. (kg) * larger radial loads possible with special bearings ORDERING EXAMPLE ST XX Model Size Adjustment range (KNm) Disengagement torque (KNm) Bore diameter D F7 Bore for fastening screw in shaft end (Q) For custom features place an XX at the end of the part number and describe the special requirements (e.g. ST1 / 025 / 5-16 / 12 / / 25.4 / XX) Special designation only (e.g. custom output flange) 40 All data subject to change without notice.

17 STN WITH CONICAL CLAMPING RING KNm ABOUT MATERIAL Hardened steel (nitrocarburized surface) DESIGN Drive side: coupling hub with conical clamping ring connection (spline profile on request) Driven side: output flange with 12x fastening threads and integral bearings Safety elements: evenly spaced around the circumference; externally adjustable Ø O Bores for manual rotation Ø B Ø F Ø E H7 J Ø D 2 N Ø A 1 C 1 C 2 Drawn offset K ISO 4017 Ø D 1 F7 Ø P Ø G h7 H SAFETY COUPLINGS ST Drawn offset MODEL STN Keyway available upon request Number of safety elements depends on the disengagement torque M L Removal jack screws Plunger for re-engagement SIZE Adjustment range available from - to (KNm) 3 x ST 15 6 x ST 15 9 x ST 15 3 x ST 15 6 x ST 15 9 x ST 15 3 x ST 30 6 x ST 30 9 x ST 30 3 x ST 70 6 x ST 70 9 x ST 70 Overall length (mm) A Flange outside diameter (mm) B Fit length / keyway length (mm) C Effective clamping length (mm) C Bore diameter possible Ø to Ø F7 (mm) D Bore diameter max. Ø F7 with keyway (mm) D Inside diameter (mm) D 2 110,2 140,2 200,2 290,2 Flange centering diameter H7 (mm) E Bolt circle diameter ±0.3 (mm) F Outside diameter h7 (mm) G Fastening threads H 12 x M16 12 x M16 12 x M20 12 x M24 Thread depth (mm) I Fit length (mm) J Tightening screw ISO x M16 9 x M16 8 x M20 8 x M24 K Tightening torque (Nm) Distance (mm) L Distance (mm) M Actuation path (mm) N 4 4 7,5 10 Mounting diameter - elements (mm) O Hub outside diameter (mm) P Moment of inertia (approx.) D max. (10 ³ kgm²) Speed max. (rpm) Allowable max. radial force standard* (KN) Approx. weight at D max. (kg) * larger radial loads possible with special bearings ORDERING EXAMPLE STN XX Model Size Adjustment range (KNm) Disengagement torque (KNm) Bore diameter D F7 Bore for fastening screw in shaft end (Q) For custom features place an XX at the end of the part number and describe the special requirements (e.g. STN / 025 / 5-16 / 12 / / 25 / XX) Special designation only (e.g. custom output flange) All data subject to change without notice. RW-COUPLINGS.COM 41

18 ST2 WITH SIMPLE KEYWAY MOUNTING KNm ABOUT MATERIAL Safety coupling portion: hardened steel (nitrocarburized surface) Elastomer segments: precision molded, wear resistant rubber compound (75-80 Shore A) Elastomer coupling: hubs made from coated high strength cast steel DESIGN With keyway connection (spline profile on request). Elastomer segments compensate for misalignment and absorb vibration. Safety elements evenly spaced around the circumference. Field adjustable within the specified range. A 1 Ø B 1 Ø O ISO 4029 E 1 A 2 N Drawn offset ISO 4029 Ø B 2 DIN 6885 DIN 6885 Ø F Ø D 1 F7 K C 3 C 2 Ø D 2 F7 Ø P MODEL ST2 Bores for manual rotation Number of safety elements depends on disengagement torque C 1 E 2 Elastomer segments Cover (removable) M L Ø G Plunger for re-engagement SIZE Adjustment range available from - to (KNm) x ST 15 6 x ST 15 9 x ST 15 3 x ST 15 6 x ST 15 9 x ST 15 3 x ST 30 6 x ST 30 9 x ST 30 3 x ST 70 6 x ST 70 9 x ST 70 Overall length ±2 (mm) A Length of torque limiting portion (mm) A Flange outside diameter (ST portion) (mm) B Flange outside diameter (elastomer portion) (mm) B Fit length/keyway length D1 (mm) C Fit length/keyway length D2 (mm) C Bore depth (torque limiting portion) (mm) C Bore diameter (elastomer portion) Ø Ø F7 (mm) D * * * * Bore diameter (torque limiting portion) Ø Ø F7 (mm) D * * * * Length to cover (mm) E Length to (cover removed) (mm) E Hub diameter (mm) F Bore for fastening screw (mm) G max. 110 max. 140 max. 200 max. 290 Distance (mm) L Distance (mm) M Actuation path (mm) N Mounting diameter - elements (mm) O Hub outside diameter (mm) P Moment of inertia (approx.) D max. (10 ³ kgm²) Speed max. (rpm) Approx. weight at D max. (kg) Axial (mm) Lateral (mm) Angular (Grad) Dynamic torsional stiffness at T KN (Standard A Insert) (10³ Nm/rad) * larger bore diameters upon request. 42 All data subject to change without notice.

19 THE ELASTOMER SEGMENT The compensating elements of the ST2 safety couplings are the elastomer segments. They transmit torque while damping vibration and compensating for lateral, axial and angular misalignment. Three different versions are available with version A being supplied unless otherwise specified. Type Relative damping (ψ) Temperature range constant peak A (Standard) C to +80 C +90 C Note Material Shore hardness Features Natural and synthetic rubber B C to +100 C +120 C Synthetic rubber Shore A Shore A Very high wear resistance Resistant to many oils and fuels C C to +120 C +140 C Silicone rubber Shore A High temperature range Elastomer segments can be easily changed after installation. Every coupling utilizes 6x elastomer segments. The elastomer segments do not need to be installed prior to coupling mounting. Elastomer segment SAFETY COUPLINGS ST CHANGING THE ELASTOMER SEGMENTS Elastomer coupling side Torque limiting side Cover (axially removable) Cover (axially removed) For easier handling, the coupling will be shipped unassembled. ORDERING EXAMPLE ST XX Model Size Adjustment range (KNm) Disengagement torque (KNm) Bore Ø D1 F7 Bore Ø D2 F7 For custom features place an XX at the end of the part number and describe the special requirements (e.g. ST2 / 025 / / 15 / 127 / / XX) Special designation only (e.g. custom output flange) All data subject to change without notice. RW-COUPLINGS.COM 43

20 ST4 WITH SIMPLE KEYWAY MOUNTING KNm ABOUT MATERIAL Safety coupling portion: hardened steel (nitrocarburized surface) Gear coupling portion: wear resistant high strength alloy steel (nitrocarburized surface) DESIGN With keyway connection (spline profile on request). Gear coupling for misalignment compensation. Safety elements evenly spaced around the circumference. Field adjustable within the specified range. Ø B 1 A 1 Ø B 2 Ø B 3 E 1 Gear coupling N E 1 Drawn offset F DIN 609 Ø B 4 Ø D 1 F7 C 1 Ø 0 C 2 Ø D 2 F7 Bores for manual rotation Number of safety elements depends on the disengagement torque E 2 F DIN 609 M L Gear coupling Plunger for re-engagement DIN 6885 or ANSI B17.1 keyway MODEL ST4 SIZE Adjustment range available from - to (KNm) 3 x ST 15 6 x ST 15 9 x ST 15 3 x ST 15 6 x ST 15 9 x ST 15 3 x ST 30 6 x ST 30 9 x ST 30 3 x ST 70 6 x ST 70 9 x ST 70 Overall length (mm) A Flange outside diameter (ST portion) (mm) B Mounting flange outside diameter (ST portion) (mm) B Flange outside diameter (gear coupling) (mm) B Hub diameter (gear coupling) (mm) B Fit length/keyway length (mm) C 1/ Bore diameter Ø bis Ø F7 (mm) D 1/ * * * * Length (mm) E Length (mm) E Screw DIN (mm) 8 x M16 8 x M20 10 x M20 16 x M24 F Tightening torque (mm) Distance (mm) L Distance (mm) M Actuation path (mm) N Mounting diameter - elements (mm) O Moment of inertia (approx.) D max. (10-3 kgm²) Speed max. (rpm) Approx. weight at D max. (kg) Axial (mm) Lateral (mm) Angular (Degrees) * larger bore diameters upon request. 44 All data subject to change without notice.

21 FUNCTION OF THE GEAR COUPLING The high precision gearing of the coupling compensates for lateral, angular, and axial misalignment. The gearing transmits torque with minimal backlash and a high degree of torsional rigidity. The precise geometry of the gearing ensures the performance of the coupling. Axial misalignment Angular and lateral misalignment Coupling hub with convex, high-precision teeth Precise gearing of flange SAFETY COUPLINGS ST Coupling hub is axially displaced within the flange Coupling hub is tilted relative to the flange MAINTENANCE AND LUBRICATION Note: Lubrication of the gearing is very important to the service life of the coupling. An additional seal (optional) ensures the lubrication of the gearing over a long period of time. Use only high performance grease RECOMMENDED LUBRICANTS Normal speed High speed Castrol Impervia MDX Caltex Coupling Grease Esso Fibrax 370 Klüber Klüberplex GE Klüber Klüberplex GE Mobil Mobilgrease XTC Mobil Mobilux EPO Shell Albida GC1 Shell Alvania grease EP Texaco Coupling Grease R-O or ER 1 Total Specis EPG For easier handling, the coupling will be shipped unassembled. Seal O-Ring Grease Grease fitting (closed with self-locking screw) Optional additional seal Gearing Torque limiter ORDERING EXAMPLE ST XX Model Size Adjustment range (KNm) Disengagement torque (KNm) Bore Ø D1 F7 Bore Ø D2 F7 For custom features place an XX at the end of the part number and describe the special requirements (e.g. ST4 / 025 / / 15 / 100 / 120 / XX) Special designation only (e.g. custom output flange) All data subject to change without notice. RW-COUPLINGS.COM 45

22 ATEX FOR USE IN HAZARDOUS AREAS ATEX CERTIFIED COUPLINGS RW-COUPLINGS.COM 83

23 ATEX FOR USE IN HAZARDOUS AREAS INDUSTRIAL DRIVE COUPLINGS MARKING EXAMPLE Based on the ATEX markings the product can be certified for suitability under certain conditions. II 2G c IIA T6 X II 2D c 85 C X Equipment group Category Protection type Explosion group / temperature class / maximum surface temperature Additional features Equipment group I II Approval type approved for underground operation approved for all other applications Category Approved for zone Zone description 1G 0 Area in which an explosive atmosphere consisting of a mixture of air and flammable gases, vapors, or mists, is present continuously, frequently, or for long periods of time. 2G 1 Area in which the potential exists for an explosive mixture of air and flammable gases, vapors, or mists to occur. 3G 2 Area in which the potential for an explosive mixture of air and flammable gases, vapors, or mists to occur is unlikely and only for a brief duration. 1D 20 Area with the same conditions as zone 0, with powder or dust. 2D 21 Area with the same conditions as zone 1, with powder or dust. 3D 22 Area with the same conditions as zone 2, with powder or dust. Protection type c Definition Design safety level: ignition hazard is avoided by the product design. Example classification by occurring gases, mists and vapors according to temperature class and explosion group Explosion group / temperature class / maximum surface temperature IIA IIB (includes IIA) IIC (includes IIA + IIB) T1 / 450 C acetone, ammonia, methane... natural gas hydrogen T2 / 300 C ethyl alcohol, butane, cyclohexane... ethylene, ethylene oxide ethyne (acetylene) T3 / 200 C gasoline, diesel fuel, fuel oil... ethylene glycol, hydrogen sulfide T4 / 135 C acetaldehyde ethyl ether T5 / 100 C T6 / 85 C carbon disulphide Additional labeling X U Definition Special operating conditions Product is only a component in a machine. Conformity therefore shall only be declared after installation. 84 All data subject to change without notice.

24 GENERAL INFORMATION The use of devices and components in explosive areas is governed by the European directives 94/9/EC (for manufacturers) and 1992/92/EC (for operators). The presented products are non-electrical equipment of category 2. According to Directive 94/9/EC, delivery of an ATEX coupling requires the inclusion of special installation and operating instructions along with the EC declaration of conformity issued by the manufacturer. All necessary values for installation, operation and removal are included. All models of BX, LP, EK, and ST are available with ATEX certification on request. The BZ coupling is not intended for use in hazardous areas. R+W Couplings are ATEX approved for use in general industry (Group II). Operation in hazardous zones 1 and 2 (Category 2G) and 21 and 22 (category 2D) are allowed. For the device group I, as well as for zones 0 and 20 the couplings are not registered. Product specific information about ATEX certified couplings, such as temperature class, are available on request. All statements made about ATEX conforming products are based on our present knowledge and experience. R+W reserves the right to change technical specifications. ATEX CERTIFIED COUPLINGS All data subject to change without notice. RW-COUPLINGS.COM 85

25 PERFECT CONNECTIONS WORLDWIDE. QUALITY "MADE IN GERMANY." AUSTRALIA ARGENTINA BELGIUM BOSNIA-HERZEGOVINA BRAZIL CHILE CHINA DENMARK ESTONIA FINLAND FRANCE GREECE UK INDIA INDONESIA ISRAEL ITALY JAPAN CANADA COLOMBIA KOREA CROATIA LITHUANIA MALAYSIA MEXICO MACEDONIA MONTENEGRO NEW ZEALAND NETHERLANDS NORWAY AUSTRIA PERU PHILIPPINES POLAND PORTUGAL ROMANIA RUSSIA SAUDI ARABIA SWEDEN SWITZERLAND SERBIA SINGAPORE SLOVAKIA SLOVENIA SPAIN SOUTH AFRICA TAIWAN THAILAND CZECH REPUBLIC TURKEY UKRAINE HUNGARY USA UNITED ARAB EMIRATES 86 RW-KUPPLUNGEN.DE

26 R + W ANTRIEBSELEMENTE GMBH Alexander-Wiegand-Strasse 8 D Klingenberg/Germany Phone Fax info@rw-kupplungen.de R+W ITALIA S.R.I. Via Pisa, 134 I Sesto San Giovanni (MI) Phone Fax info@rw-italia.it R+W AMERICA 1120 Tower Lane Bensenville, IL USA Phone Fax info@rw-america.com R+W MACHINERY (SHANGHAI) CO., LTD Dept. J, 4 Floor, No 207, Tai Gu Road PRC Waigaoquiao Free Trade Zone (Postcode ) Shanghai China Phone Fax info@rw-china.com R+W FRANCE OFFICE 713, route de Tréconnas F Ceyzeriat France Phone Fax info@rw-france.fr R+W SINGAPORE OFFICE 55 Market Street #10-00 Singapore Phone Fax info@rw-singapore.com.sg RW-COUPLINGS.COM 87

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